yay!! I also got those =] Do you know how to find the domain and range of these functions? This is all new to me heh.

Sorry for the delay

For the domain, just remember that you can't divide something by 0, so x for which the denominator is = 0 may not be in the domain ! That's nearly all you need here.
In other cases, you may need to know that, for example, you can't have a negative number under a square root.

For the range, you may need this information : -1 <= cos(x) (or sin(x)) <= 1